Car-truck.



No. 799,085. PATBNTED SEPT. 12, 1905. H. M. PPLAGER 6L C. H. HOWARD.

CAR TRUCK.

AIPLIGATION FILED JUNE 21. 1905.

gjm.. @@Mfm y ama/MM maw 5 .mmm co wwe-unconxnns wwwrun n c,

UNITED STATES PATENT OFFICE.

HARRY M. PFLAGER AND CLARENCE H. HOI/VARD, OF ST. LOUIS, MISSOURI,ASSIGNORSTO AMERICAN STEEL-BODY DOUBLE-BOLSTER CO., OF ST. LOUIS,MISSOURI, A CORPORATION OF NEV JERSEY.

CAR-TRUCK.

Specification of Letters Patent.

Patented Sept. 12, 1905.

Application filed June 21, 1905. Serial No. 266,274.

To @ZZ whom, it may concern.-

Be it known that we, HARRY M. PFLAGER and CLARENCE H. HOWARD, citizensof the United States,residing at St. Louis,in the State of Missouri,have invented a new and useful Improvement in Car-Trucks, of which thefollowing is a specification.

Our invention, which is in the nature of an improvement on that forwhich Letters Patent of the United States were granted to us November 8,1904, No. 774,492, for an improvement in car-trucks, relates to thecenter-plate of the car-truck bolster and has for its object to enablethe center-plate to be vertically adjusted for taking up the set of thebearing-springs and wear of the wheels, and thereby maintain a constantlevel of the car-body.

Our invention consists in features of novelty, as hereinafter describedand claimed, reference being' had to the accompanying drawings, formingpart of this specification, whereon- Figure 1 is a top plan of acar-truck bolster having our improved center-plate; Fig. 2, a verticallongitudinal section through the bolster and center-plate on line 2 2 inFig. 1; Fig. 3, a vertical transverse section thereof, partly brokenaway, on line 3 3 in Fig'. 1; and Fig'. et, a similar view thereof inthe adjusted position ofthe center-plate.

Like letters and numerals of reference denote like parts in all thefigures.

a is the center beam or bolster of a cartruck, (preferably six-wheeled,)which spans the spring-beams 7) (indicated by broken lines in Figs. 1and 2) and is similar in construction and arrangement, except whereotherwise specified, to that described in the said Letters Patent, or itmay be otherwise conligured, as found most suitable.

c is the truck center-plate, which in lieu ot' being' cast integral withthe body of the bolster a, as in the said Letters Patent, is of separateconstruction, removably fixed to the bolster and perforated centrallyfor the king'- bolt (not shown) in the usual manner. The

center-plate c is formed or provided with a preferably rectangular(circular, elliptical, or other' shaped) base-plate 1, which is adaptedto lit and slide vertically at its circumference or perimeter within acorrespondingly-shaped pocket or recess 2, formed in the top of thebolster a, at the middle thereof, and having its sides or surroundingwall extending upward to a suitable height therefrom.

Through registering holes 3 1 in the baseplate 1 and bottom of thepocket 2, respectively, pass bolts 5, which in the initial position ofthe several parts of the truck secure the center-plate @directly to thebottom of the pocket 2, as seen particularly in Fig. 3.

By this construction as the main bearingsprings of the car-truck settleand the wheels become worn a constant level of the car-body ismaintained by removing the bolts 5 and raising the center-plate c in thepocket 2 according'ly, a liner 6, of wood or other suitable material, insuch case being placed within the pocket 2 between the bottom thereofand the base-plate 1 of the center-plate c, and by substituting longerbolts 5 for the bolts 5 the center-plate c is thereby held at theadjusted level, as seen particularly in Fig. L1, whereas when the truckcenter-plate is cast integrally with the bolster, as described in thesaid patent, the level of the car-body is rendered va-V riable.

A great advantage of this construction is that by fitting the base-plate1 of the centerplate c closely within a pocket 2, which is integral withthe bolster a, the center-plate c, while capable of vertical adjustment,is rigidly held in place and shearing strain on the bolt 5 or prevented.

vWhat we claim as our invention, and desire to secure by Letters Patent,is-` 1. In a car-truck, the combination with the truck-bolster having' apocket in the top, of a center-plate perforated for the king-bolt, thesaid plate being held by and adapted to be vertically adjustable withinthe said pocket, and means for removably fixing the centerplate to thesaid bolster, substantially as described.

2. In a car-truck, the combination with the names to this speofeation inthe presence of tWo subscribing Witnesses.

HARRY M. PFLAGER. CLARENCE H. HOWARD. Witnesses:

ARTHUR T. MOREY,

truck-bolster having a pocket in the top, of a center-plate perforatedfor the king-bolt and having a base-plate adapted to slidablyt Withinthe said pocket, and means for remov- 5 ably xing the center-plate tothe said bolster, substantially as described.

In testimony whereof We have signed our EDWARD W. FURRELL.

